You know, until you mentioned it there I hadn't realised what a male orientated list that was.
Female sf writers.....
OK. Karen Traviss is well liked around here at the moment (City of Pearl/Crossing the Line). I enjoyed Karin Lowachee's Warchild when I read it and have the sequel to read. Nancy Kress? Rather traditional SF. Julie E. Czerneda might be worth an addition. Liked 'In the Company of Others'. But they are more traditional SF - IMO none of these have 'that style' like a Morgan or a Grimwood. Tricia Sullivan (see 'Maul') is possibly the closest I can think of, though I wasn't that impressed with it myself. CJ Cherryh's an obvious one, (Downbelow Station/Cyteen) though I have struggled with some of hers. Fantastic ideas but quite slow. Justina Robson's well liked (though I haven't had chance to read any of hers. Natural History was nominated for an award, if I remember right).
I'd love to see Mary Gentle (see Ash, A Secret History, and Orthe) try a space opera, though I would've thought it unlikely.
I'll keep thinking! Should keep you going though.